{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["GENE"], "input": "A second important molecule in TCR signal transduction is the guanine nucleotide binding protein , p21ras , which is coupled to the TCR by a protein tyrosine kinase dependent mechanism ."}
{"GENE": ["TCR", "guanine nucleotide binding protein", "p21ras", "protein tyrosine kinase"]}